Answer:
They are not made from living things.
<em>hope</em><em> this</em><em> </em><em>answer</em><em> correct</em><em> </em><em>:</em><em>)</em>
A. cell division or <span>b. cell fractionation
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Inhale and exhale because you inhale the oxygen and exhale the carbon dioxide
Amino acids are acids on one hand, and a base on the other hand.
<h3>What is an acid?</h3>
An acid is a substance that produces hydrogen or hydroxonium ions as the only positively charged ion when it ionizes.
All amino acids have an amine group -
and a carboxylic group -
.
The carboxylic group ionizes such that:

The presence of the amine group enables amino acids to also act as a base.
More on amino acids can be found here: brainly.com/question/14583479
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<span>Alfred Wegener first proposed the theory
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